58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
#pragma once
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#include "types.h"
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#include "render_util.h"
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#include "util/tree.h"
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#include "util/vector.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define PARTICLE_LAYER_COUNT 4
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// A particle instance.
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typedef struct {
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uintptr_t id; // ID.
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double size, sizedec; // Diameter & decrease speed, size=0 and the particle is removed
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Duration tolive; // Time desiginated to live, 0 for forever
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TimePoint addtime; // Time when this particle is added
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Vec2 pos, vec; // Center & Speed
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double vec_friction; // Friction, fraction of Vec per second
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const FillMode *mode; // Fill Modes, NULL for default mode (solid fill)
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} Particle;
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typedef struct _App App;
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// Particle system.
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typedef struct {
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App *super;
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tree_Tree *parts[PARTICLE_LAYER_COUNT]; // uintptr_t -> struct Particle
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vector_Vector *deleted_ids;
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uintptr_t maxID;
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} System_Particle;
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System_Particle *particle_NewSystem(App *super);
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void particle_DeleteSystem(System_Particle *sys);
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void particle_Advance(System_Particle *sys, Duration deltaTime);
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void particle_Render(System_Particle *sys);
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// Emit a particle here.
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void particle_Emit(System_Particle *sys, int layer, Vec2 pos, Vec2 vec, double vec_friction, double size, double sizedec, Duration tolive, const FillMode *fill);
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// Clear all particles.
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void particle_Clear(System_Particle *sys);
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#ifdef __cplusplus
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}
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#endif
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